Ram



March 1 1927. 1,619,605

M. W. FAHERTY RAM Filed Sept. 21, 1925 Patented Mar. 1, 1927.

UNITED STATES PATENT oEFICE.

Application filed September 21, 1925. Serial No, 57,771.

In a ram and cylinder combination as, for example, in a cotton-seedpress, the cylinder is provided near its outer end with an annulargroove for receiving a packing crimp. This crimp must be renewed fromtime to time and no satisfactory method has been devised heretofore foreffecting this renewal without the cost of considerable time and labor.The usual practice is to remove the press box and the ram cap and towithdraw the ram completely from the cylinder. This frequently requiresseveral hours work of three or four men. According to one expedient bywhich the removal of the entire ram is avoided, the ram is formed in twoparts, the top part being detachable from the main bottom part forexposing the packing'crimp. The joint between the two'parts can,however, never be made entirely smooth and the consequent greater wearon the crimp necessitates a more frequent renewal thereof.

According to the present invention I pro vide means for preventing theram from passing below the crimp in normal action but permitting the ramto fall below the crimp when it is desired to expose the packing.Specifically I provide a stop member in the lower part of the cylinderadapted to abut the ram for limiting its inward travel or to enter in arecess in the bottom of the ram upon a rotation of the latter so thatthe ram may pass inwardly beyond the crimp. I also provide an accessoryimplement for aiding in the manipulation of the ram.-

I shall describe my invention with particular reference to theaccompanying draw ings, in which Fig. l is a top plan View of a raincylinder and cap, the press columns being shown in section;

Fig. 2 is a section 011 the line 2-2 of Fig. 1;

Fig. 3 is a section on the line 33 of Fig. 2;

Fig. 4 shows a portion of a view according to Fig. 2 (the parts being indifferent relative position) andin cross section an accessory implement;and

Fig. 5 shows the implement in top plan view.

Referring to the drawings, 10 is a hydraulic cylinder, 11 a ram workingtherein, while 12 is a ram cap supported on the outer end of the ram andhaving dowel pins 13 adapted to engage in corresponding recesses 141 inthe ram. The ram cap is prevented from operationof the ram the recess 18is at right angles to the abutment 16, as may be most clearly seen fromFig. 3. 1 Under such conditions the projection does not enter the recessand the inward travel of the ram is thus limited by the contact of wall17 with the abutment so that the upper end of the ram is prevented frompassing below the crimp 19. r

If, however, it is desired to change the crimp, the operating medium isintroduced into the cylinder and the ram elevated.

The ram cap and press boxes are securely blocked in elevated position,whereupon the ram is allowed to descend and disengage from them. Theannulus20 (Figs. 4 and 5) is provided with handles 21 having shanks 22projecting through the annulus and adapted to engage in holes 14 of theram.

The annulus is placed in position on the upper face of the ram and thelatter is 1'0- tated' thereby throughan angle of degrees. This rotationbrings the abutment l6 and recess 18 into register, and upon exhaustingthe pressure fluid from the cylinder the ram is permitted to descend tothe position shown in dotted lines in Fig. 2, thereby bringing its upperface beneath the crimp 19 so that'the latter is exposedupon removing theannulus 20. The new crimp is .now inserted and the annulus readjusted inoperative position, as shown in Fig. 1, so as to hold the crimp inplace. The pressure fluid is now admitted to the cylinder and the ramlifted and turned by means of the handles 21 back to, its originalposition, in

which the instrumenta-lities 16 and 18 again assume the position shownin Figs. 2 and 3.

Having thus described my invention, I claim:

1. In combination, a cylinder having an end wall element, a ram elementin said cylinder, and an abutment on one of said elements intermediatethe two elements, said abutment being normally adapted to abut the otherof said elements on the inward stroke of said ram element, said otherelement having a recess, saidelements being relatively adjustable forpermitting said abutment to enter said recess.

2. In combination, a cylinder having an end Wall element, a ram elementin said cylinder, and an abutment on one of said elements intermediatethe two elements, the other of said elements having a recess, saidabutment being normally in non-registering position relative to saidrecess but being adapted to register with said recess; upon a rotationof said ram element relative to said cylinder, for the purposedescribed."

3. In combination, a cylinder having an end Wall element, a ram in saidcylinder, an axial abutment of polygonal cross-section on one of saidelements intermediate the two elements, the other of said elementshaving an axial recess of cross-section similar to said abutment, saidabutmentand recess being normally in non-registering position but beingadapted to register with each other upon a rotation of said ramelementrelative to said cylinder, for the purpose described.

' 4. In combination, a cylinder having an end Wall, a ram in saidcylinder, and an axial abutment of polygonal cross-section on said endivall Within the cylinder, said ram having arecess of cross-sectionsimilarto said abutment, said abutment and recess lacing normally innon-registering"position but being adapted to register with each otherupon a rotation of said ram relative to said cylinder, for the purposedescribed.

The foregoing specification signed at Los Angeles California, this 20thday of August, 1925. a i

MICHAEL FAHERTY.

